Resize images in codeginiter - php

Question

currently I'm working with codeigniter framework but I'm confused how to resize the image. I have followed the documentation but I'm still confused. This is my code
public function create(){
//Check login
if(!$this->session->userdata('logged_in')){
redirect('users/login');
}
$data['title'] = 'Create Post';
$data['categories'] = $this->BlogModel->get_categories();
$this->form_validation->set_rules('title','title','required');
$this->form_validation->set_rules('content','content','required');
if($this->form_validation->run() === FALSE){
$this->load->view('frontend/header');
$this->load->view('frontend/navbar');
$this->load->view('frontend/blog/create',$data);
$this->load->view('frontend/footer');
} else{
//Upload Image
$config['upload_path'] = './assets/images/posts/blog';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '2048';
$config['max_width'] = '0';
$config['max_height'] = '0';
$this->load->library('upload', $config);
if(!$this->upload->do_upload()){
$errors = array('error' => $this->upload->display_errors());
$post_image = 'noimage.jpg';
}else{
$data = array('upload_data' => $this->upload->data());
$post_image = $_FILES['userfile']['name'];
}
$this->BlogModel->create_post($post_image);
//set message
$this->session->set_flashdata('post_created','Your post has been created');
redirect('blog');
}
}
Please advice how to resize the image.
Thanks!

Answer 1

If you want to do different things like resize the original image directly, rather than creating a thumb set create_thumb to false, and do not use new_image. The only difference between create_thumb and new_image is that new_image allows you to specify your own path and name. Whereas the most you can do with create_thumb is change the thumb_marker. Which is all in the docs...
//Upload Image
$config['upload_path'] = './assets/images/posts/blog';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '2048';
$config['max_width'] = '0';
$config['max_height'] = '0';
$this->load->library('upload', $config);
if (!$this->upload->do_upload()) {
//$errors = array('error' => $this->upload->display_errors());
exit($this->upload->display_errors());
$post_image = 'noimage.jpg';
} else {
$up_data = $this->upload->data();
$post_image = $up_data['name'];
$config = array(); // clear prev config
$config['image_library'] = 'gd2';
$config['source_image'] = $up_data['full_path'];
$config['create_thumb'] = TRUE;
$config['thumb_marker'] = '_thumbnail';
$config['maintain_ratio'] = TRUE;
$config['width'] = 75;
$config['height'] = 50;
$this->load->library('image_lib', $config);
if(!$this->image_lib->resize()) {
exit($this->image_lib->display_errors());
}
$thumb_path = $up_data['file_path'] . $up_data['raw_name'] . $config['thumb_marker'] . $up_data['file_ext'];
}
The exits you can remove later, but leave them for debugging until you figure out a way to properly message your errors (I suggest session vars). These functions should also be moved to a model.